new Subspecies 0/ Spalax monticola. 317 



greater than the distance between the anterior and the poste- 

 rior paUital foraniijia; posterior border of palate situate 

 behind level of alveoli of ^-"ii^^ straight, and without median 

 spine ; postpalatine foramina slightly in advance of the 

 septum between 'Hi^ and ^±1 ; pterygoid and paroccipital pro- 

 cesses as in anatoUcus, 



Mandible. — The lower jaw shows a decided tendency to 

 assume the form characteristic of Macrospalax ; it is very 

 hirge and robust ; the coronoid process is very powerful and 

 erect ; the incisura between the coronoid process and the 

 condyle is very long and flatly rounded ; alveolar process 

 very large and lieavy, the corono-alveolar incisura wider, 

 though as rounded as in anatoHcus; angular process about 

 as in anatoUcus, with well-marked and definitely inflected 

 angulus anterior ; the alveolar and condylar lengths about 

 equal. 



Dentition, — Incisors : u])per incisors faintly yellow, the 

 colour most intense along middle line ; lower incisors nearly 

 white. Upper and lower incisors with faint traces of median 

 groove. 



Cheek-teeth. — ^ii2 of normal pattern, anterior labial fold 

 represented by an islet, the second labial and the lingual fold 

 still open ; "'-^ exactly similar; ^^ with a single circular 

 islet. The right and left lower molars show a curious diffe- 

 rence in their respective states of wear; ^ni with labial fold, 

 siin|)le anterior lingual fold, the posterior lingual fold repre- 

 sented by a very small islet (L.), already gone (H.); ^172 (R.) 

 with labial and anterior lingual folds still open, the posterior 

 linj^ual fold entirely gone, (L.) similar, but anterior lingual 

 fold just insulated ; ,:;73 (U.) with an anterior lingual islet, 

 the labial fold still 0{)en and deep, (L.) with merely a central 

 triangular islet and no other complication. 



Molar roots and alveoli. — '^^ has merely one root, the large 

 lingual element being fused throughout with both the labial 

 elements, the only interval being that left between the two 

 labial portions ; alveolus very simple, its sole complication 

 being the vestigial labial se|jtum which tits into the inter- 

 space between the two labial elements of the single fang; 

 "^ and ^— quite similar to "Iii in these res))(;cts. In tlie 

 hnver jaw ;;ri has two large I'oots, and its alveolus is divided 

 by a complete though thin septum ; in ,7^1 the anterior root 

 shows traces of a lingual and a labial element, but it is 

 j):irtially fused on the linjiual side with the posteiior root, and 

 in ihe alveolus thenfore tiio transverse septum is incomplete. 



